Duplex weigher.



E. H. MESSITER.

DUPLEX WEIGHER.

APPLICATION FILED FEB. 7. 19m

1,163,678. Patented Dec.14, 1915.

2 SH EET l.

COAL

COLUMBIA PLANOHRAFH (50., WASHINGTO N. D. c.

E. H. MESSITER.

DUPLEX WEIGHER.

APPLICATION FILED FEB. 7. 1914.

Patented Dec. 14, 1915.

2 SHEETS-SHEET 2.

INVENTOR @WVL/Z M Esges 57% 6 ATTORNEY COLUMBIA I'LANOGRAPH CD.\VJ\SHINGTON, u. c.

UNITED STATES PATENT OFFICE.

EDWIN H. MESSITER, OF BROOKLYN, NEW YORK, ASSIGNOR T0 ELECTRIC WEIGHINGCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DUPLEX WEIGHER.

To all whom it may concern Be it known that I, EDWIN H. Mnssrrnn, acitizen of the United States, and a resident of Brooklyn, county ofKings, and State of New York, have invented certain new and usefulImprovements in Duplex Veighers, of which the following is aspecification, reference being had to the accompanying drawings, forminga part thereof.

My invention relates to weighers for traveling conveyers and its objectis to provide a simple arrangement by means of which the weight of theload carried by such a conveyer may be measured accurately.

More specifically the invention relates to the provision of weighingapparatus at two parts of an endless conveyer with means for obtaining acommon reading therefrom.

Other objects will appear in the following specification in which I willdescribe my invention and the novel features of which I will set forthin claims.

Referring to the drawings, Figure 1 is a diagrammatic representation ofan endless traveling conveyer of the bucket type with my inventionapplied thereto. Figs. 2 and 3 are respectively a front elevation and aplan view of an electric magnetically actuated register which may beused in carrying out the invention. In Fig. 4 is shown in elevation,partly in section, a relay such as may be used for controlling thecircuits of the registers. Fig. 5 shows a bucket tripping cam lever andcircuit closer which may be used in such an installation as that shownin Fig. 1.

Like characters of reference designate corresponding parts in all thefigures.

10 designates an endless conveyer of the bucket type which comprises aplurality of links 11 pivotally supporting the buckets 12, rollers 13,supporting rails 14: and pulleys 15, at least oneof which is powerdriven to move the conveyer.

On the sides of the buckets are cams 16 and at suitable intervalspivoted cam levers 17 are provided for the purpose of tilting thebuckets by engagement with the cams thereon to cause the buckets tosuccessively discharge their contents at desired points. These camlevers may be raised into active position by pulling down a pivoted arm18,

Specification of Letters Patent.

Patented Dec. 14, 1915.

Serial No. 817,109.

a part 19 of which is adapted to raise the cam lever and to maintain itin its raised or actuating position.

A coal car is shown at 20 the contents of which may be dumped through achute 21 into the conveyer buckets.

22 is a coal storage bin into which coal from the conveyer may be dumpedthrough a chute .43 or from which coal may be discharged onto theconveyer through a chute 2%.

A bank of three boilers is shown in Fig. 1 at 30, 31 and 32 above whichare chutes 25, 26 and 27 through which coal from the conveyor may bedischarged into their respective boilers. Below the boilers are ashchutes 33, 3 1, 35 through which ashes from the boilers may bedischarged onto the conveyer.

36 is another chute through which ashes from the conveyer may bedischarged into an ash receptacle 37. A discharge spout 38 is providednear the base of this receptacle through which ashes may be dischargedinto a car standing in the position of the car 20.

The foregoing brief description outlines such a conveyer arrangement asmight be installed in a power plant. It has been selected asillustrative of an installation with which the present invention may beused advantageously.

According to the embodiment of my invention which is shown in thedrawings, a part of the track 1% is removed and replaced by a tracksection 1'0 which is suspended from pivoted levers 4L1. The free ends ofthese levers are connected with a scale beam 12 which is fulcrumed at 43and on one part of which is a balance weight 44. From the other end ofthe scale beam is suspended a plunger -.5 which is adapted to bedepressed into a receptacle 16 by the weight of the buckets 12 and thematerial, if any, therein as they pass over the rail section 10. Themovement of the plunger causes the height of a body of mercury to changeto vary the amount of a resistance 47 in proportion to the load on thetrack section 40.

A dynamo 418 is arranged to be driven at s N Q i,166,61o

pulleys 15. This dynamo is so wound that the voltage it generates isproportional to the rate of speed of the conveyer. The re sistance l?and an electric meter 49 are in a circuit which is closed across thearmature of the dynamo. This arrangement is such that the meter is actrated at a rate proportional to the weight of the buckets on the railsection 20, and in proportion to the rate at which the buckets moreacross the rail section. This tien gires a convenient and accurate meansof weighing tae con *cyer at one part of its path of ravel.

So far as the present intention is concerned, any other desired term ofcontinuous weigher mechanism may be used, but I have shown and describedthe kind or weigher which 1 actually use as 1 belieye it to be the mostaccurate and most convenient arra igement available for this purpose.

At another part of the path of travel of the conveyer, a part of itssupporting track 1% is replaced by a track section 50 suspended frompiroted levers 51 which are connected with a scale beam which isarranged in the manner already described to vary the amount of i 5'? incircuit with a d 1 and a meter 59. This meter is arranged as is theother one, to be actuated in proportion to the weight of the load whichit measures and in proportion to the rate of movement of the load, whichin this case is the weight of the bucket and the material, if any, inthem, as they pass over the rail section 50.

The elect 'ic meters shown are 01" the retary type and each may ifdesired, be provided with a register. In the specific embodiment of myinvention which is shown,

each meter is arri need moment: ril 1 to close.

two local circuits during each its revolut-ions. Associated with meter49 is a batte y 60 one terminal of which is connected with the shaft 01"the meter and its other terminal is connected with tl e windings of twoelectromagnets (31. magnet windings are also connected with stationarycon tacts within the meter and thrieter mechanism is such that during arevolution of its shaft a circuit is momentarily closed through windingof magnet 61 and another circuit is momentarily closed through wind ingof magnet 62 so that these magnets are alternately energized.

lVhen magnet 61 is energized it pulls its armature 65 to the left. Thisis connected as shown in Fig. at to tilt a Vacuum tube (llinto such aposition as to can e a small body of mercury 65 to move to the right andto close a circuit between two terminals at 66. hen magnet 62 isenergized the armature 63 is pulled over to the right. This tilts themercury tu e the opposite way, breaks the connection between theterminals 66 and connection between terminals 67 end of the time.Similar con- 68 and (3%) are alternately connected .isconnected by asimilar relay arrangectuated by the meter which is lllllStl'RtQCl inFig. ere are siown in outted more in detail in o l these rcg strscomprises an elec $70 which irough its a rinature ant and ratchetmechanism 71 i adaptc a shaft in a clocln wise directiu anelcctrc-magnet 73 which through a pawl and ratchet mechai Kl i cordingmy actuate any on tions. Thus 1' section on, the two weighin oppositedit p; over he weight passr, of the regtwo wei ghs1 direcore. i thatpass 'ercnce betw ed on the 1. witi the two A d, .7 1 K l: swn

ch pi'oiiucd at the chat "3) o er and others 82 8 3 and at the tripsabore the coal bin and abc 'c boilers Joe. 3, Q and 1 respectirely. C'neterminal 87 of a battery 86 is connected with out of the terminals ofeach 01 ie i minal of this battery is connected of the relay con'acts att The other relay contacts at 35, G are connected by conductors 38 withtne lower left hand contact of eac f the switches 80, 81, S2, 83, and55. e other relay contacts at (38, ('39 connccteu by conductors 89 withthe lower right liaud contact of each of these switches.

It it is desired to measure the an cunt of coal delivered from the car90, the switch 80 is closed. This switch comorises a contac a which isconnected at a Hih one of the actuating magnets in register 90, and isadapted to coiiierate with the lower left hand contact of the switch;and another contact 7) which is conn 2cted at 7) with the otheractuating magnet of the same register.

The loaded buckets passing over tracl: section will by mechanisms wnichhave been described, cause intermittent encrgiza tion of the right handactuating magnet of register 90 at a frequency proportional to t o uL vi the of the loaded buckets and to the rate of their movement over thetrack section 50. This magnet will actuate the register disks in apositive directionthat is in a direction to cause these disks to show anincreasing figure.

Assuming that the coal has been dumped from the buckets before theyreach the track section 40, which would always be the case in the normaloperation of the conveyer plant,the Weight of the buckets and of any oddpieces of coal which may have remained in them will cause intermittentenergization of the actuating magnet 73 of register 90 which is anegative direction or against the operation of magnet 70. The e ect ofthe magnet 70 will be to register the gross weight of the buckets andthe coal in them, and the effect of the magnet 73 will be to deduct theactual tare, that is the weight of the buckets and their connected partsand the weight of any undelivered coal in them. Consequently, theregister 90 will register accurately the total amount of coal taken intothe plant.

WVhen the coal is discharged into the bin 22, the switch 82 is closed,and its contacts at c and (1, connected at 0 and d with the actuatingmagnets in register 91 and operating in the manner before described willcause this register to show the weight of coal delivered to the coalbin. In a similar manner, switch 83 which is connected with register 93will cause the latter to register the weight of coal delivered to boilerNo. 3; switch 84 and register 9st will cause the weight of coaldelivered to boiler No. 2 to be shown, and switch 85 and register 95will register the weight of coal delivered to boiler No. 1.

I have also shown a means for weighing the ashes as they are deliveredthrough chutes 33, 34 or 35 into the conveyer buckets and dumpedtherefrom through chute 36 into the ash bin 37. In this case the switch81 is closed and its contact 6 is connected at 6' with the left handactuating magnet 73 of register 92 instead of to the right handactuating magnet, as in the other cases, and its contact f is connectedwith the right hand actuating magnet. This is because in this case theweight passing over the track section 40 is the gross and that passingover track section 50 is the tare.

The plant illustrated to show the operation of my invention is selectedonly as an example of one of the uses to which it may be put and one inwhich its advantages are apparent. But it is illustrative only as theinvention is limited only by the restrictions in the claims, and isobviously applicable to other kinds of plants and other uses.

What I claim is:

1. In combination with an endless conveyer, two mechanically independentweighers in different parts thereof, and means for obtaining a resultantreading from said weighers.

2. In combination with an endless convcyer, two mechanically independentweighers in different parts thereof, and a registering instrumentconnected with and actuated by both of said weighers.

3. In combination with an endless conveyer, two weighers in differentparts thereof, and a registering instrument connected with both of theweighers and arranged to be actuated in one direction by one of theweighers and in the opposite direction by the other weigher. a

In combination with an endless conveyer, two weighers in different partsthereof, two meters each arranged to be actuated by oneof the weighers,and a registering instrument connected with both of said meters.

5. In combination with an endless conveyer, two weighers in differentparts thereof, two meters each arranged to be actuated by one of theweighers and a plurality of registering instruments each arranged to beconnected with both of said meters.

6. In combination with an endless conveyer, two weighers in differentparts thereof, two meters each arranged to be actuated by one of theweighers, a plurality of registering instruments and means for connect-'ing any of said instruments with both of the meters.

7 In comblnation with an endless conveyer, two weighers in differentparts thereof, two meters each arranged to be actuated by one of theweighers, an electro-magnetically actuated registering instrument,circuits therefor and means actuated by the meters for controlling saidcircuits,

8. In combination with an endless conveyer, two weighers in differentparts thereof, two meters each arranged to be actuated by one of theweighers, a plurality of electro-magnetically actuated registeringinstruments, circuits therefor, means actuatedby the meters forcontrolling said circuits and switches for connecting the circuits ofany desired instrument with said meter actuated means.

9. In combination with an endless conveyer, two weighers in differentparts thereof, two electric meters each arranged to be actuated by oneof said weighers and each comprising means for intermittently closing anelectric circuit, an electro-magnetically actuated registeringinstrument and circuits therefor connected with both of said meters.

10. In combination with an endless conveyer, two weighers in differentparts thereof, two electric meters each arranged to be actuated by oneof said weighers and each comprising means for intermittently closing anelectric circuit, a plurality of electroinagnetica-lly actuatedregistering instruments, circuits therefor and switches in said circuitsarranged to connect the circuits of any of said instruments with both ofsaid meters.

11. In combination with an endless conveyer, two weighing mechanisms indifferent parts thereof, each comprising a dynamo connected to be drivenby the conveyer, a dynamo circuit, and a resistance and an electricmeter in the dynamo circuit, said meters being arranged tointermittently close the electric circuits, and electroanagneticallyactuated registering instruments and circuits therefor connected withboth of said meters.

12. In combination with an endless conveyer, two weighing mechanisms indifferent parts thereof each comprising a dynamo connected to be drivenby the conveyer, a dynamo circuit, and a resistance and an electricmeter in the dynamo circuit, said meters being arranged tointermittently close the electric circuits, a plurality ofelectro-magnetically actuated registering instrui'nents, circuitstherefor, and switches in said circuits arranged to connect the circuitsof any of said instruments with both of said meters.

13. In combination with an endless conveyer, a dumping device, twoweighers in different parts of the conveyer, means for obtaining aresultant reading from said weighers and means connected with saiddumping device for connecting said means for obtaining a reading withboth of the weighers.

4C. In combination with an endless conveyer, a dumping device, twoweighers in different parts of the conveyor, a registering instrumentarranged to be actuated in one direction by one of the weighers and inthe opposite direction by the other weigher and means for actuating thedumping device and connecting said instrument with both of the weighers.

15. In combination with an endless c0nveyer, a dumping device, twoweighers in different parts of the conveyer, a registering instrumentarranged to be actuated in one direction by one of the weighers and inthe opposite direction by the other weigher, and means for actuating thedumping device and connecting said instrument with both of saidweighers.

16. In combination with an endless conveyer, an adjustable dumpingdevice adapt ed to discharge into the conveyer, two weighers indifferent parts of the conveyer, an electro-magnetically actuatedregistering instrument oppositely responsive to the respective weighers,circuits for the instrument and a switch in said circuits operativelyassociated with the dumping device arranged to connect said circuitswith said instrument when the dumping device is adjusted to operativeposition.

17. In combination with an endless conveyer, a plurality of dumpingdevices adapted to discharge into diiferent parts thereof, two weighersin different parts of the con veyer, a plurality of registeringinstruments each arranged to be actuated by both of the weighers andmeans for actuating one of the dumping devices and connecting one ofsaid instruments with both of the weighers.

18. In combination with an endless conveyer, a plurality of dumpingdevices adapted to discharge into different parts thereof, an actuatingmechanism for each dumping device, two weighers in different parts ofthe conveyer, a plurality of registering instruments each arranged to beactuated by both of the weighers and means associated with saidactuating mechanisms whereby when one of them is actuated, one of saidinstruments is connected with both of the weighers.

19. In combination with an endless conveyer, a plurality of dumpingdevices in different parts thereof, an actuating mechanism for eachdumping device, two weighers in diiferent parts of the conveyer, aplurality of electro-magnetically actuated registering instruments,circuits therefor, means actuated by the weighers for controlling saidcircuits, and switches operatively associated with said actuatingmechanisms each arranged to be closed when its respective mech anism isadjusted into operative position to thereby connect the circuits of oneof said instruments with both of the weighers.

20. In combination with an endless conveyer, a plurality of dumpingdevices in different parts thereof, an actuating mechanism for eachdumping device comprising an actuating arm, a switch associated withsaid arm, two weighers in different parts of the conveyer, two meterseacli arranged to be actuated by one of the weighers and comprisingmeans for intern'iittently closing an electric circuit, a plurality ofelcctro-magnetically actuated re :tering instruments and circuitstherefor, each of said switches being arranged to connect the circuitsof one of said instruments with both of the meters when the actuatingarm with which it is associated, moved to bringits respective dumpingdevice into operative posltion.

21. In combination with an endless convcyer, a plurality of dumpingdevices in different parts thereof, an actuating mechanism for eachdumping device comprising an actuating arm, a switch associated withsaid arm, two wei her mechanisms in different parts of the conveyor eachcomprising a dynamo connected to be driven by the con veyer, a dynamocircuit, and a resistance and an electric meter in the dynamo circuit,said meters being arranged to intermittently close the electriccircuits, a plurality of electro-magnetically actuated registeringinstruments and circuits therefor, each of said switches being arrangedto connect the circuits of one of said instruments with both of themeters when the actuating arm with which it is associated, is moved tobring its respective dumping device into operative 10 position.

In witness whereof, I have hereunto set my hand this 2nd day ofFebruary, in the copies of this patent may be obtained for five centseach, by addressing the Commissioner 0! Patents, Washington, I). G.

